GB2001495A - Limiting audio signal peaks without distortion - Google Patents
Limiting audio signal peaks without distortionInfo
- Publication number
- GB2001495A GB2001495A GB7830532A GB7830532A GB2001495A GB 2001495 A GB2001495 A GB 2001495A GB 7830532 A GB7830532 A GB 7830532A GB 7830532 A GB7830532 A GB 7830532A GB 2001495 A GB2001495 A GB 2001495A
- Authority
- GB
- United Kingdom
- Prior art keywords
- distortion
- clipper
- input
- audio signal
- high frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005236 sound signal Effects 0.000 title 1
- 208000019300 CLIPPERS Diseases 0.000 abstract 3
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 abstract 3
- 230000000873 masking effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
- H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
- H05C1/00—Circuits or apparatus for generating electric shock effects
- H05C1/04—Circuits or apparatus for generating electric shock effects providing pulse voltages
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Life Sciences & Earth Sciences (AREA)
- Insects & Arthropods (AREA)
- Catching Or Destruction (AREA)
- Generation Of Surge Voltage And Current (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
A peak-limiting apparatus and method particularly useful in systems employing high frequency pre- emphasis to compensate for steep high frequency rolloff in a receiver, or the like. The apparatus and method is useful in standard AM broadcasting to maximize loudness without noticeable distortion. The psycho-acoustic phenomenon of "masking" is used to estimate maximum (non-audible) clipping. The distortion caused by a clipper is determined by subtracting a clipper's output from its input. This distortion is compared in a plurality of critical bands with the input to provide a gain control feedback signal for a variable gain stage connected to the input of the clipper. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772733145 DE2733145C2 (en) | 1977-07-22 | 1977-07-22 | Electrical circuit arrangement for generating pulses for electric fence devices |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2001495A true GB2001495A (en) | 1979-01-31 |
GB2001495B GB2001495B (en) | 1982-01-13 |
Family
ID=6014602
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7830063A Expired GB2001497B (en) | 1977-07-22 | 1978-07-17 | Series-parallel coupled circuit for use for example with an electric fence |
GB7830532A Expired GB2001495B (en) | 1977-07-22 | 1978-07-20 | Apparatus and method for peak-limiting audio frequency signals |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7830063A Expired GB2001497B (en) | 1977-07-22 | 1978-07-17 | Series-parallel coupled circuit for use for example with an electric fence |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU523322B2 (en) |
DE (1) | DE2733145C2 (en) |
FR (1) | FR2398410A1 (en) |
GB (2) | GB2001497B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006053684A2 (en) * | 2004-11-18 | 2006-05-26 | Fachhochschule, Jena | Signal processing unit and signal processing method |
WO2009074945A1 (en) | 2007-12-11 | 2009-06-18 | Nxp B.V. | Prevention of audio signal clipping |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3009838C2 (en) * | 1980-03-14 | 1982-09-23 | Horizont Gerätewerk GmbH, 3540 Korbach | Pulse generator |
DE3229326A1 (en) * | 1982-08-06 | 1984-02-09 | BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau | Circuit arrangement for generating and transmitting high-power pulses, and a method for its operation |
AU592155B2 (en) * | 1986-02-24 | 1990-01-04 | Gallagher Electronics Limited | Electric fence energiser |
US4767999A (en) * | 1986-11-12 | 1988-08-30 | Megapulse, Inc. | Method of and apparatus for radio-frequency generation in resonator tank circuits excited by sequential pulses of alternately opposite polarity |
FR2673020B1 (en) * | 1991-02-20 | 1995-05-19 | Seroe Iesm | SYSTEM FOR PROTECTING A FORBIDDEN SITE AGAINST INTRUSIONS, INCLUDING AN ELECTRIFIED FENCE. |
DE4327572C1 (en) * | 1993-08-17 | 1994-10-13 | Horizont Geraetewerk | Electrical fence apparatus |
DE59901570D1 (en) | 1998-09-29 | 2002-07-04 | Siemens Ag | PULSE GENERATOR FOR GENERATING A VOLTAGE PULSE AND RELATED METHOD |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE873620C (en) * | 1949-09-21 | 1953-04-16 | Ernst Hobbie | Arrangement for the generation of electrical high voltage pulses for electric fences |
DE844618C (en) * | 1950-06-03 | 1952-07-21 | Adolf Nissen | Switching device for electric fences |
DE859658C (en) * | 1951-02-15 | 1952-12-15 | Wilhelm Petersen | Shock pulse generator for electrical enclosure systems u. Like. With impulse introduction through gas discharge tubes |
DE1845058U (en) * | 1961-10-02 | 1962-01-18 | Heinz Dr Mueller | ELASTIC FENCE. |
DE1191488B (en) * | 1962-06-19 | 1965-04-22 | Adolf Salzer | Transistor circuit for electric pasture fences with protection of the switching transistor |
DE1413550A1 (en) * | 1963-09-30 | 1969-01-09 | Licentia Gmbh | Resonant circuit inverter |
US3427501A (en) * | 1965-09-03 | 1969-02-11 | Unitek Corp | Capacitor linear charging power supply |
CH477128A (en) * | 1968-03-14 | 1969-08-15 | Cie Generale D Electronique In | Pulse generator circuit |
CH542450A (en) * | 1972-02-09 | 1973-09-30 | Bbc Brown Boveri & Cie | Method for reducing the effective earth capacitance of a cutting device operated together with a repetition pulse generator |
US3849670A (en) * | 1973-04-13 | 1974-11-19 | Webster Electric Co Inc | Scr commutation circuit for current pulse generators |
-
1977
- 1977-07-22 DE DE19772733145 patent/DE2733145C2/en not_active Expired
-
1978
- 1978-07-17 GB GB7830063A patent/GB2001497B/en not_active Expired
- 1978-07-20 GB GB7830532A patent/GB2001495B/en not_active Expired
- 1978-07-21 FR FR7821750A patent/FR2398410A1/en active Granted
- 1978-07-24 AU AU38286/78A patent/AU523322B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006053684A2 (en) * | 2004-11-18 | 2006-05-26 | Fachhochschule, Jena | Signal processing unit and signal processing method |
WO2006053684A3 (en) * | 2004-11-18 | 2006-12-14 | Fachhochschule Jena | Signal processing unit and signal processing method |
WO2009074945A1 (en) | 2007-12-11 | 2009-06-18 | Nxp B.V. | Prevention of audio signal clipping |
Also Published As
Publication number | Publication date |
---|---|
FR2398410B1 (en) | 1983-10-14 |
FR2398410A1 (en) | 1979-02-16 |
AU523322B2 (en) | 1982-07-22 |
DE2733145C2 (en) | 1982-09-30 |
GB2001497B (en) | 1982-04-07 |
GB2001495B (en) | 1982-01-13 |
GB2001497A (en) | 1979-01-31 |
AU3828678A (en) | 1980-01-31 |
DE2733145A1 (en) | 1979-02-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE20 | Patent expired after termination of 20 years |
Effective date: 19980705 |